HANDLE? What HANDLE?
You need the "open end wrench" thing to unlock the decklid, and an allen wrench to lock/unlock the rear bow from the decklid. (See the owner's manual section on manually raising and lowering the top).
You can get the allen wrench at any store that sells them - I believe it is a 5.5 mm or something like that. I can't go check, because I had to park my car in the front of the subdivision because they are sealing the pavement here! I'll check tomorrow for you, if no one else chimes in first.
Do not call the dealer back or ever go there again.